Observed and predicted [X/Fe] vs [Fe/H] trends for Sr, Y, Zr and for Ba, La, Ce. Solid green curves show the predicted trend for the best-fitting [Eu/Fe] vs. [Fe/H] trend, while lighter green lines represent that range spanned by models within the top 100. The lower light blue lines represent the results of the model in case there is only the s-process contribution. Symbols for the observational data are the same as in Figure 3.